Mine went dead too just now. Was in Godfinger and bam, dead. Won't power on unless plugged and DFU mode fails with same errors.
Going to go to apple store in hope they have one to give me cause I got no phone and I use this for work stuff like alerts for servers.
Going to go to apple store in hope they have one to give me cause I got no phone and I use this for work stuff like alerts for servers.